feat: ship v1.0.0 with character graph and writing analytics

Add P7 Cytoscape relationship graph with setting CRUD, P9 cockpit analytics driven by writing_sessions, chapter POV selection, and full test coverage.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/shared/electron-api.d.ts

@@ -49,7 +49,10 @@ import type {
   GoalNotificationPayload,
   KnowledgeInjectionLog,
   WritingAchievement,
-  PomodoroDuration
+  PomodoroDuration,
+  CharacterGraphData,
+  CharacterRelationship,
+  WritingAnalyticsSummary
 } from './types'
 
 export interface ElectronAPI {
@@ -387,6 +390,26 @@ export interface ElectronAPI {
     markSeen: (bookId: string) => Promise<IpcResult<void>>
     shouldShowOnOpen: (bookId: string) => Promise<IpcResult<boolean>>
   }
+  graph: {
+    getData: (bookId: string, filter?: 'all' | 'connected') => Promise<IpcResult<CharacterGraphData>>
+    upsertRelationship: (
+      bookId: string,
+      sourceId: string,
+      relationship: Partial<CharacterRelationship> & {
+        targetId: string
+        label: string
+        intimacy: number
+      }
+    ) => Promise<IpcResult<CharacterRelationship>>
+    deleteRelationship: (
+      bookId: string,
+      sourceId: string,
+      relationshipId: string
+    ) => Promise<IpcResult<void>>
+  }
+  analytics: {
+    getSummary: (bookId: string) => Promise<IpcResult<WritingAnalyticsSummary>>
+  }
   bridge: {
     get: (
       bookId: string,